Asymmetric intermediate reflector for tandem micromorph thin film silicon solar cells

被引：73

作者：

Soederstroem, T. ^{[1
]}

Haug, F. -J. ^{[1
]}

Niquille, X. ^{[1
]}

Terrazzoni, V. ^{[1
]}

Ballif, C. ^{[1
]}

机构：

[1] EPFL, Inst Microengn, Photovolta & Thin Film Elect Lab, CH-2000 Neuchatel, Switzerland

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 06期

关键词：

amorphous semiconductors; elemental semiconductors; semiconductor thin films; silicon; solar cells; thin film devices;

D O I：

10.1063/1.3079414

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The micromorph solar cell (stack of amorphous and microcrystalline cells) concept is the key for achieving high efficiency stabilized thin film silicon solar cells. We introduce a device structure that allows a better control of the light in-coupling into the two subcell components. It is based on an asymmetric intermediate reflector, which increases the effective thickness of the a-Si:H by a factor of more than three. Hence, the a-Si:H thickness reduction diminishes the light induced degradation, and micromorph tandem cells with 11.2% initial and 9.8% stabilized efficiencies (1000 h, 50 degrees C, and 100 mW/cm(2)) are made on plastic substrates with T(g)< 180 degrees C.

引用

页数：3

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